Appeal 2006-1263
Application 10/173,259
device fixed in the holes of the combustion chamber wall by welding or
brazing, and for reasons of cost and ease of repair, it is advantageous for the
bushings to be fixed by welding.
Appellants further argue that modifying the integral flow passage A of
Monk so as to include the elliptically shaped bushing as taught by Rice,
would render Monk unsatisfactory for its intended purpose because it would
“detrimentally interfere with the cooling system used in Monk” because the
Rice’s bushing does not have orifices for passage of cooling air substantially
along the side wall of the combuster (Br. 9). Rice was relied upon solely
for its teaching of bushings in a combustion chamber having a substantially
elliptical right section (column 5, ll. 5-10; Figure 3). The Examiner’s
combination of Monk in view of Rice does not require being able to
physically place the removable bushing of Rice into an opening in the
combustion chamber sidewall of Monk. Combining the teachings of
references does not involve an ability to combine their specific structures.
Modifying the shape of the flow passage A in Monk would not interfere with
the cooling system used to cool the side walls of the combustion chamber.
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